LayoutTests/accessibility/mac/local-frame-presentational-iframe-content.html

<!DOCTYPE HTML>
<html>
<head>
<script src="../../resources/accessibility-helper.js"></script>
<script src="../../resources/js-test.js"></script>
</head>
<body>

<div id="host" role="group">
<button id="before">Before</button>
<iframe id="iframe" role="presentation" src="../resources/presentational-iframe-content.html"></iframe>
<button id="after">After</button>
</div>

<script>
var output = "This test ensures the content of a presentational (accessibility-ignored) iframe is hoisted in the accessibility tree, with childrenCount and indexOfChild consistent with the hoisted children, and can reach the root via ancestry walk.\n\n";

var host, root, button;
function ancestryReaches(element, target) {
    for (var ancestor = element; ancestor; ancestor = ancestor.parentElement()) {
        if (ancestor.isEqual(target))
            return true;
    }
    return false;
}

window.jsTestIsAsync = true;

async function runTest() {
    if (!window.accessibilityController)
        return;

    // The iframe has more than one top-level child, so its content must be hoisted as multiple children of
    // the host -- this is what distinguishes the cross-frame-aware count and index paths from the raw stitched
    // children (where the iframe counts as a single placeholder).
    button = await waitForElementById("frame-button-1");
    await waitFor(() => {
        if (!button)
            return false;
        host = accessibilityController.accessibleElementById("host");
        return host && host.childrenCount === 4 && host.childAtIndex(1).isEqual(button);
    });

    root = accessibilityController.rootElement;

    output += expect("host.childrenCount", "4");
    output += expect("host.childAtIndex(0).domIdentifier", "'before'");
    output += expect("host.childAtIndex(1).domIdentifier", "'frame-button-1'");
    output += expect("host.childAtIndex(1).role", "'AXRole: AXButton'");
    output += expect("host.childAtIndex(2).domIdentifier", "'frame-button-2'");
    output += expect("host.childAtIndex(3).domIdentifier", "'after'");

    // The count, children list, and index lookups must all agree on the hoisted list, otherwise
    // NSAccessibility drops trailing children or misindexes them.
    output += expect("host.indexOfChild(host.childAtIndex(1))", "1");
    output += expect("host.indexOfChild(host.childAtIndex(2))", "2");
    output += expect("host.indexOfChild(host.childAtIndex(3))", "3");

    output += expect("(button && host ? ancestryReaches(button, host) : false)", "true");
    output += expect("(button && root ? ancestryReaches(button, root) : false)", "true");

    debug(output);
    finishJSTest();
}

window.addEventListener("load", runTest);
</script>
</body>
</html>